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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Schedule of Fair Value Financial Assets The following tables present the fair value of the Company’s financial assets determined using the inputs defined above (in thousands).
December 31, 2020
Level 1Level 2Level 3Total
Assets
Money market funds$59,823 $— $— $59,823 
U.S. government securities— 190,677 — 190,677 
Corporate notes— 26,423 — 26,423 
Commercial paper— 29,489 — 29,489 
Total$59,823 $246,589 $— $306,412 

December 31, 2019
Level 1Level 2Level 3Total
Assets
Money market funds$13,897 $— $— $13,897 
U.S. government securities— 77,400 — 77,400 
Corporate notes— 14,966 — 14,966 
Commercial paper— 35,753 — 35,753 
Total$13,897 $128,119 $— $142,016